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Texas Instruments UCC28881 | Demoboard TIDA-01097
<125-μA Standby, High-Efficiency Power Supply Reference Design for Neutral-less Wireless Lighting Controls
Overview
| Topology | Flyback Converter |
| Input voltage | 93.5-126.5 V |
| Output 1 | 3.58 V / 0.01 A |
| IC revision | 001 |
Description
Lighting control devices such as wired or wirelessswitches and dimmers may be used in retrofitenvironments or in new installations. New installationsmay have separate line, neutral, and earth wireswhere the lighting control unit can be powered byconnecting it between the line and neutral, whereas inmost of the retrofit installations only line and earthwires may be available. In such cases, the lightingcontrol unit has to be powered by connecting itbetween line and earth terminals while ensuring thatthe current flowing to earth is limited to 0.5 mA. Thisnecessitates the use of a very low standbyconsumption, high efficiency power supply.This TI Design is a wireless lighting control unit usinga low quiescent current offline converter that enablesexcellent efficiency at low power levels, a low-noise,high-PSRR, low quiescent current, good line and loadtransient response LDO, and a very low standby andlow active current specs wireless microcontroller.
Features
<125-μA quiescent current including wireless MCU and 69% efficiency @ 35mW loadOff-line converter with integrated 700-V power MOSFETHigh side current limit circuit with inherent inrush current limiting, output overload and short circuit protectionsLow noise, high PSRR, low quiescent current, good load transient response LDO for wireless controlTested and characterized with SimpleLink Bluetooth® Low Energy Wireless MCU having 1-μA standby, low Rx, Tx, core and sensor controller currents enabling easy implementation of lighting controlsEnables neutral less lighting control applications with earth as return that complies with UL773A
Typical applications
- Neutral-less or No Neutral Wireless Lighting, Control Switches, Dimmers, Photo Control Units
- Motion Sensors, Occupancy and Vacancy Sensors
More information
Products
| Order Code | Datasheet | Simulation | Downloads | Product series | VIN | VOut1 (V) | IOut1 (mA) | fswitch (kHz) | L (mH) | NPRI : NSEC : NAUX | ISAT (A) | VT (V (AC)) | L (mm) | W (mm) | Mount | Size | C | Tol. C | VR (V (DC)) | Operating Temperature | DF (%) | RISO | Ceramic Type | Fl (mm) | RDC max. (Ω) | fres (MHz) | Version | Pins | Rows | H (mm) | Gender | Type | IR (A) | Packaging | Samples | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
 | 750343332 | SPEC | 5 files | MID-OLTI Offline Flyback Transformers for Texas Instruments | 70 - 283 V (AC) | 5 | 100 | 62 | 20.18 | 12.61:1 | – | 1500 | 10.16 | 8.26 | THT | EP7 | – | – | – | -40 °C up to +125 °C | – | – | – | – | – | – | – | – | – | 9.78 | – | – | – | Tray | ||
 | 7447462471 | SPEC | 8 files | WE-TI Radial Leaded Wire Wound Inductor | – | – | – | – | 0.47 | – | 0.4 | – | 6 | 6 | THT | 5075 | – | – | – | -40 °C up to +125 °C | – | – | – | – | 2.4 | 3.4 | Heat Shrinking Tube | – | – | 8.5 | – | – | 0.35 | – | ||
 | 885012109007 | SPEC | 8 files | WCAP-CSGP MLCCs 10 V(DC) | – | – | – | – | – | – | – | – | 3.2 | 2.5 | – | 1210 | 47 µF | ±20% | 10 | -55 °C up to +85 °C | 10 | 0.002 GΩ | X5R Class II | 0.75 | – | – | – | – | – | 2.5 | – | – | – | 7" Tape & Reel | ||
 | 61300411121 | SPEC | – | 6 files | WR-PHD 2.54 mm THT Pin Header | – | – | – | – | – | – | – | – | 10.16 | – | THT | – | – | – | – | -40 °C up to +105 °C | – | 1000 MΩ | – | – | – | – | – | 4 | Single | – | Pin Header | Straight | 3 | Bag |
| Order Code | Datasheet | Simulation | |
|---|---|---|---|
| 750343332 | SPEC | |
| 7447462471 | SPEC | |
| 885012109007 | SPEC | |
| 61300411121 | SPEC | – |
| Samples |
|---|
| Order Code | Datasheet | Simulation | Downloads | Product series | VIN | VOut1 (V) | IOut1 (mA) | fswitch (kHz) | L (mH) | NPRI : NSEC : NAUX | ISAT (A) | VT (V (AC)) | L (mm) | W (mm) | Mount | Size | C | Tol. C | VR (V (DC)) | Operating Temperature | DF (%) | RISO | Ceramic Type | Fl (mm) | RDC max. (Ω) | fres (MHz) | Version | Pins | Rows | H (mm) | Gender | Type | IR (A) | Packaging | Samples |
|---|